According to sources, Perry exited the stage mid song, while the band continued to play their cover of Spirit’s “I Got a Line.” Footage taken at the gig shows Perry, sitting down, and struggling to perform, then ducking behind the amp stack. Various reports say the Aerosmith guitarist was rushed to the hospital. CBS New York says that he is in critical condition.

The band, which also features Alice Cooper, Johnny Depp, Robert DeLeo of Stone Temple Pilots and former Guns N Roses/Velvet Revolver drummer Matt Sorum, finished the concert. The band is scheduled to perform on The Late Show with Stephen Colbert tomorrow.

UPDATE: Various reports say that Perry’s condition has been upgraded to “stable.”

UPDATE: Alice Cooper has tweeted that Perry “is stable, with family and under the best care,” a sentiment echoed by Perry’s official twitter account. Aerosmith hasn’t made a statement, but they did retweet the message on Perry’s account. Matt Sorum also tweeted well wishes to his current bandmate.